Restart Heka services when removing config files

Change-Id: I3264f1dac770a65206308e58160c4362ed66e694
diff --git a/heka/_service.sls b/heka/_service.sls
index 359e716..874e9ca 100644
--- a/heka/_service.sls
+++ b/heka/_service.sls
@@ -20,6 +20,8 @@
   file.directory:
   - name: /etc/{{ service_name }}
   - clean: true
+  - watch_in:
+    - service: heka_{{ service_name }}_service
 
 {%- if grains.get('init', None) == 'systemd' %}
 {%- set systemd_enabled = True %}